Experimental demonstration of unrepeatered transmission up to 746.69km using optimal modulation and Raman pumps, indicating advancements in long-distance data transfer.
We experimentally demonstrate record unrepeatered transmission of single-carrier 100Gb/s, 200Gb/s and 400Gb/s over 746.69km, 730.83km and 701.52km. The proposed scheme is realized with optimal modulation format, commercial high-order Raman pumps, forward and backward ROPAs and ultra-low-loss fiber.
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Qiu et al. (2025) studied this question.
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